A relatively small area in Malaya, about 200 miles long by 40 miles wide, is the most important source of tin in the world. Some
The correlation of the high temperature chemical properties of slag-metal systems with some easily measured property of either slag or metal at room temperature has
When supplies of high pressure mercury or other liquids are required in analytical work, it is convenient to have the source of supply at a
On the basis of experiments conducted on quartz using a bubble pick-up method, it was shown in an earlier paper that this mineral will preferentially
This paper presents the results of laboratory measurements of relative permeabilities to oil and gas on small core samples of reservoir rock by five methods,
The technique of concentrating valuable minerals from lean ores by flotation depends upon the creation of a finite contact angle at the three-phase contact, mineral-water-air.
A field procedure for determining graphite in drilling mud is presented which is sensitive to 0.25 lbs/bbl and accurate to 20 per cent. The method,
Flotation test work on Bolivian tin ores some years ago led to the development of several workable schemes of selective soap flotation, but left unanswered
The direct reduction of metallic sulphides, as in the precipitation method for lead or antimony, is not a widely used process today. However, it might
In these times of rising labor and material costs, it has become more and more necessary that attention be paid to some operating details which,